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TPS3700: Power dissipation Power Consumption of the IC

Ena Peh
Prodigy 210 points
Part Number: TPS3700
Other Parts Discussed in Thread: TINA-TI

Tool/software:

Hi TI

I would like to enquire if there is anyway i can do to calculate the power dissipation of the TPS3700 IC with explanation? I can calculate the static loss through the leakage current but how about the dynamic power dissipation? Any other factor I should also look at?

Best 

Ena

  • 0
    TI__Genius 9640 points

    Hi Ena, 

    Our supervisor is low IQ, simple devices and we are not switching, so static loss should be good enough to calculate power dissipation. 

    But I think you might like to check App note:  Semiconductor and IC Package Thermal Metrics for RθJA, which quantifies how well a device dissipates heat from its internal junction (where the power is dissipated) to the surrounding ambient environment.

    Best, 

    Sila Atalar 

  • 0 in reply to Sila Atalar
    Prodigy 210 points

    Hi Sila,

    Thanks for your help! What happens when OV or UV is detected and the logic states switches from high to low and then it changes back when none is detected? 

    I tried running the TINA-TI software and I measured the OUTA and OUTB current reading to be around 689uA when it is logic HIGH and 1.83nA when it is logic LOW.

    If I were to calculate the current consumption of the ic how should I go about doing so? Will it also be considered the static power?

    Best

    Ena

  • 0 in reply to Ena Peh
    Prodigy 210 points

    Forgot to add in that my pullup to 3.3V is 4.75kOhm. I want to calculate the power consumption/dissipation so I can select the resistor power rating with the 0.5 derating.

  • 0 in reply to Ena Peh
    TI__Genius 9640 points

    Hi Ena, 

    Yes, that also consider as static power. Please refer the supply current, input current value from the datasheet. 

    Best, 

    Sila